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And now I could spend literally all of my time driving around and tuning my car... Having 100% control over the mechanical symphony and its various sensors is crazy. Tuning a carbureted engine is my roots (and I'm not any good at it) but when you can build your own ECU and tune it so that your car starts and runs in any condition 100% better than it did when stock is crazy. I love putting it in 3rd gear and flooring it from 1000 RPM up to the rev limiter and watching the air-fuel ratios be perfect with no chugging, bucking, pinging or hiccups.

Just wanted to share. My thanks to all the great people out there that have developed this system so that people like me can have control over their cars. If you've never installed Megasquirt in a car, you've really got to try it. It's not as hard as you think thanks to the designers who have made it easy!

Welcome to the sickness. I've got MSIII on my DD, MSII on my father's and two more cars in my fleet or my immediate families fleet getting MS of some form or another. It's increasingly addictive when you learn all the things you can do with each individual system.

The following it has with Miata/Nissan/Early 90's BMW groups is awesome, but if you really want to see how fantastic MS is, find someone that's converted an old car with carbs or CIS and see how much it absolutely transforms the vehicle

This! And actually the DIYPNP models made by DIY Autotune are very simple. That's what I built. I remember reading threads 10 years ago about Megasquirt. If you built your own Megasquirt computer back then you really WERE a huge nerd. You actually had to research where every wire needed to go for your particular application, do math, etc...

With mine, it came with all the parts I needed, every resistor individually bagged and tagged, and a detailed description of where every jumper wire on the circuit board needed to be soldered. I'm already a decent hand at soldering, which made it easy, if a bit tedious.

There are guys out there that build and sell these boards so you don't have to make them yourself. They can crank out a fully finished ECU in a couple of hours. It took me a full weekend. But I'd rather do EVERYTHING so that I understand what's going on. There's no magic to what goes on in that black box if you make it yourself

OP, this is awesome! I keep telling myself "one of these days i'm getting MS..."

I'm curious about this setup... I see a supercharger on right, that pipes the air over to the intake manifold on the left... but where is it pulling air from? is the intake hidden below? I'd like to see more pics of your setup

See the foam brick at the lower right corner of the supercharger in that pic? That's the foam air cleaner. Not the best location because the header is also on that side (this supercharger application is known as a "hot side" supercharger) but in a Miata there isn't an easy way to get cold air. I'm planning on rerouting the intake up to the cowl to get some colder air (you can just see half of a hole in the firewall at the right hand side of the photo)

FV-QR

I would love to do something like this but it's impossible when you live in a city/state that requires OBD-II checks and frequently a drive on the dyno with tailpipe sniffers to pass vehicle inspection.

Yeah, I think it's best for vehicles that are OBD1 or older. The tailpipe sniffer check wouldn't be difficult with MS, but the OBD2 check would be a challenge. A good tune can be powerful and efficient/low emissions.

I would love to do something like this but it's impossible when you live in a city/state that requires OBD-II checks and frequently a drive on the dyno with tailpipe sniffers to pass vehicle inspection.

I would love to do something like this but it's impossible when you live in a city/state that requires OBD-II checks and frequently a drive on the dyno with tailpipe sniffers to pass vehicle inspection.

Yeah that sucks

At this point I could return the car to the stock ECU in order to pass the sniffer, it would involve putting the stock injectors back in and removing the supercharger belt. But it would be a bit of a pain. My car is a 96 so it is (was) OBD2.